Disable the CRC check in multi-threaded test cases in buffer cache
Disable the CRC check in multi-threaded test cases in buffer cache

We plan to adapt the buffer cache multi-threaded test cases to
synchronize the accesses to the same file.

Change-Id: I54273bd35dad74764d623f03f21ea5127f6ace37

hisundar/forestdb,seem-sky/forestdb,zhaog/forestdb,couchbase/forestdb,nvoron23/forestdb,joliss/forestdb,wurikiji/forestdb,jinxuan/forestdb,seem-sky/forestdb,couchbase/forestdb,wurikiji/forestdb,sushmaad/forestdb,yyangpan/forestdb,hisundar/forestdb,jinxuan/forestdb,yyangpan/forestdb,joliss/forestdb,zhaog/forestdb,sushmaad/forestdb,nvoron23/forestdb